Non-return mechanism of cable traction device

Abstract

The invention relates to the technical field of cable installation auxiliary equipment, and particularly discloses a non-return mechanism of a cable traction device, which comprises a first cylinder and a second cylinder fixedly connected in the first cylinder; the cable penetrates through the interiors of the second barrel and the first barrel; the second barrel comprises a plurality of conical thorn blocks, the conical thorn blocks are arranged in the second barrel, and the conical thorn blocks can hinder the backward movement of the cable. Through the synergistic effect of inner wall restraint of the frustum section, spring reset and inclined thorn clamping, when the cable is backward, the conical thorn blocks can be automatically folded towards the cable, and the cable is prevented from being damaged; the inclined structure of the frustum section enables the clamping force to be enhanced along with the increase of the backward force of the cable, so that the self-adaptive improvement of the effect is hindered; meanwhile, the plurality of conical thorn blocks are connected through the telescopic rod, the encircling inner diameter can be slightly adjusted along with the diameter of the cable, and the device can adapt to cables with different diameters in a certain range without replacing special parts.

Description

Technical Field

[0001] This invention relates to the field of cable installation auxiliary equipment technology, and in particular to a backstop mechanism for a cable pulling device. Background Technology

[0002] In scenarios such as power engineering cabling, communication fiber optic cable laying, and building electrical installation, cable pulling is one of the key processes. It is necessary to accurately pull the cable from the starting position to the target installation point. During this process, the cable often retreats unexpectedly due to various external forces. The cable is prone to pullback under the action of gravity or reverse friction. When erecting cables at high altitudes, even slight loosening of temporary fixing devices can cause the cable to slide down. Such retreat not only prolongs the construction period, but may also cause wear on the outer insulation layer due to repeated friction of the cable, and may even cause safety hazards such as leakage and signal transmission interruption. Therefore, the anti-reverse mechanism, as a positioning and protection component for cable pulling operations, directly affects the construction efficiency and operational safety. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to provide a reverse stop mechanism that is simple in structure, reliable in reverse stop, causes little damage to cables and is easy to operate, so as to solve the problems in the prior art.

[0004] The above-mentioned technical problems are solved by the following technical solution: The present invention proposes a reverse stop mechanism for a cable pulling device, which includes a first cylinder, a second cylinder fixedly connected inside the first cylinder; a cable, the cable passing through the interior of the second cylinder and the first cylinder; the second cylinder includes a plurality of cone-shaped spikes, the cone-shaped spikes being disposed inside the second cylinder, and the cone-shaped spikes being able to prevent the cable from moving backward.

[0005] In a preferred embodiment of the anti-reverse mechanism of the cable pulling device of the present invention: the second cylinder is composed of a cylindrical section and a frustum section, the cylindrical section of the second cylinder is located close to the first cylinder, and the frustum section of the second cylinder is located away from the first cylinder.

[0006] In a preferred embodiment of the anti-reverse mechanism of the cable pulling device of the present invention: a second through hole is provided inside the second cylinder, and the cable is inserted into the second through hole and moves along its axial direction.

[0007] In a preferred embodiment of the anti-reverse mechanism of the cable pulling device of the present invention: the cone-shaped piercing block is slidably connected inside the second through hole, the inner wall of the second through hole is adapted to the outer wall of the cone-shaped piercing block, and a slanted piercing is fixedly connected to the side of the cone-shaped piercing block facing the cable, the orientation of the slanted piercing being consistent with the insertion direction of the cable.

[0008] In a preferred embodiment of the anti-reverse mechanism of the cable pulling device of the present invention: a plurality of the cone-shaped blocks are evenly distributed in a ring and surround to form a cylindrical structure adapted to the outer diameter of the cable, and the cable is inserted into the center of the cylindrical structure.

[0009] In a preferred embodiment of the anti-reverse mechanism of the cable pulling device of the present invention: adjacent cone-shaped blocks are fixedly connected by telescopic rods.

[0010] In a preferred embodiment of the anti-reverse mechanism of the cable pulling device of the present invention: a first through hole is provided axially inside the first cylinder, the first through hole is connected to the second through hole of the second cylinder, and the cable is inserted into the first through hole.

[0011] In a preferred embodiment of the anti-reverse mechanism of the cable pulling device of the present invention: a fixing ring is fixedly connected inside the first through hole, and a fixing plate is fixedly connected to one side of the fixing ring.

[0012] In a preferred embodiment of the anti-reverse mechanism of the cable pulling device of the present invention: a third through hole is provided on the fixing plate, and the cable is inserted into the third through hole.

[0013] In a preferred embodiment of the anti-reverse mechanism of the cable pulling device of the present invention: a spring is fixedly connected to one side of the fixing plate, and the cone-shaped spike is fixedly connected to one end of the spring.

[0014] The beneficial effects of this invention are as follows: through the synergistic effect of the inner wall constraint of the truncated cone section, spring reset, and oblique thorn clamping, when the cable retracts, the cone thorn block can automatically retract towards the cable, and the inclined structure of the truncated cone section makes the clamping force increase with the increase of the cable retraction force, thus adaptively improving the obstruction effect; at the same time, multiple cone thorn blocks are connected by telescopic rods, and the encircling inner diameter can be slightly adjusted according to the cable diameter, which can adapt to cables of different diameters within a certain range without the need to replace special parts. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Wherein: Figure 1 A schematic diagram of the overall structure of the backstop mechanism of the cable pulling device is shown; Figure 2 A schematic diagram of the overall structure of the first and second cylinders of the cable pulling device's backstop mechanism is shown. Figure 3 A schematic diagram of a quarter-section of the first and second cylinders of the backstop mechanism of the cable pulling device is shown. Figure 4An enlarged schematic diagram of the backstop mechanism at point A of the cable pulling device is shown.

[0016] In the picture: 1. First cylinder; 2. Second cylinder; 3. Cable; 11. First through hole; 12. Fixing ring; 13. Fixing plate; 14. Third through hole; 15. Spring; 21. Conical spike block; 22. Angled spike; 23. Second through hole; 24. Telescopic rod. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0018] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0019] Reference Figures 1 to 4 This embodiment provides a reverse stop mechanism for a cable pulling device, including a first cylinder 1, a second cylinder 2 fixedly connected inside the first cylinder 1; a cable 3, which passes through the interior of the second cylinder 2 and the first cylinder 1; the second cylinder 2 includes a plurality of cone-shaped spikes 21, which are disposed inside the second cylinder 2 and can prevent the cable 3 from moving backward.

[0020] The first cylinder 1 provides installation space and support for the second cylinder 2. The second cylinder 2 is fixedly connected inside the first cylinder 1 by welding or other integral forming methods. Its function is to provide a guide channel for the installation and sliding of the cone-shaped block 21, and at the same time, it cooperates with the first cylinder 1 to form a complete path for cable installation, ensuring that the cable moves stably in the preset direction.

[0021] The second cylinder 2 is connected to the internal channel of the first cylinder 1, providing a path for the cable 3 to pass through. The cable 3 enters from the end of the second cylinder 2 away from the first cylinder 1, passes through the inside of the second cylinder 2, enters the first cylinder 1, and exits from the other end. This provides directional guidance for the cable 3 to be pulled and prevents the cable 3 from deviating.

[0022] Multiple conical spikes 21 are disposed inside the second cylinder 2, and their positions correspond to the cable 3. When the cable 3 shows a backward tendency, the conical spikes 21 will interact with the cable 3 and clamp the cable 3 through the oblique spikes 22, thereby restricting the reverse movement of the cable 3.

[0023] Furthermore, the second cylinder 2 is composed of a cylindrical section and a frustum section. The cylindrical section of the second cylinder 2 is located close to the first cylinder 1, and the frustum section of the second cylinder 2 is located away from the first cylinder 1. A second through hole 23 is opened inside the second cylinder 2, and the cable 3 is inserted into the second through hole 23 and moves along its axial direction.

[0024] The second through hole 23 is axially connected to the cylindrical section and the frustum section of the second cylinder 2. When the cable 3 is inserted into the second through hole 23, it can move smoothly along the axis of the through hole. At the same time, the inner wall of the second through hole 23 provides a sliding guide for the cone-shaped block 21, ensuring that the cone-shaped block 21 can only move along the axis.

[0025] Furthermore, a cone-shaped spike block 21 is slidably connected inside the second through hole 23. The inner wall of the second through hole 23 is adapted to the outer wall of the cone-shaped spike block 21. An oblique spike 22 is fixedly connected to the side of the cone-shaped spike block 21 facing the cable 3. The oblique spike 22 faces the same direction as the insertion direction of the cable 3. Multiple cone-shaped spike blocks 21 are evenly distributed in a ring and surround to form a cylindrical structure adapted to the outer diameter of the cable 3. The cable 3 is inserted into the center of the cylindrical structure. Adjacent cone-shaped spike blocks 21 are fixedly connected by telescopic rods 24.

[0026] The cylindrical section of the second cylinder 2 is fixedly connected to the first cylinder 1. The frustum section of the second cylinder 2 has a tapered structure with a diameter that gradually decreases away from the end of the first cylinder 1, and the inclination angle of its inner wall is adapted to the outer wall of the cone-shaped block 21.

[0027] The oblique spike 22 is fixed to the side of the conical spike block 21 near the cable 3 by welding or integral molding. Its tip points to the insertion direction of the cable 3, that is, the moving direction of the cable 3, i.e. facing the first cylinder 1. When the cable 3 is inserted in the forward direction, the cable 3 slides along the inclined surface of the oblique spike 22 without hindering the movement of the cable 3. When the cable 3 moves backward, the opposite side of the oblique spike 22 will engage with the surface of the cable 3, and the tip can be embedded in the outer surface of the cable 3. The friction and mechanical clamping force are used to restrict the backward movement of the cable 3. Compared with a simple smooth block, the obstruction effect is more reliable.

[0028] Multiple uniformly arranged conical spikes 21 in a ring shape allow the spikes 21 to apply force evenly around the cable 3, preventing the cable 3 from shifting or being damaged due to excessive force on one side. The cable 3 is inserted at the center to ensure balanced force around the cable 3. The telescopic rod 24 connects the spikes 21 and restricts their relative positions. The telescopic rod 24 can extend and retract radially. When the spikes 21 are pushed by the cable 3 and move towards the cylindrical section of the second cylinder 2, the spikes 21 open away from the cable 3, and the telescopic rod 24 extends to provide space for the spikes 21 to move. When the cable 3 moves backward and the spikes 21 return to the truncated cone section, the telescopic rod 24 shortens, causing each spike 21 to retract synchronously, adapting to the outer diameter of the cable 3 of different diameters.

[0029] When the spike block 21 slides along the inner wall of the frustum section, the frustum section can apply a radial constraint force to the spike block 21 through its inner wall, so that the spike block 21 fits the cable 3 more tightly when it retreats, thus enhancing the obstruction effect. When the spike block 21 retreats to the point where multiple spike blocks 21 can no longer get closer, the tilt angle of the inner wall of the frustum section can convert the axial movement of the spike block 21 into a radial clamping force. When the spike block 21 moves toward the small diameter end of the frustum section, it will be squeezed toward the cable 3 by the inner wall of the frustum section. The spike block 21 is stuck by the inner wall of the second cylinder 2. The frustum section can also apply a radial constraint force to the spike block 21 through its inner wall, further hindering the cable 3 from retreating and enhancing the obstruction effect.

[0030] Furthermore, the first cylinder 1 has a first through hole 11 axially opened inside, and the first through hole 11 is connected to the second through hole 23 of the second cylinder 2. The cable 3 is inserted into the first through hole 11.

[0031] The first through hole 11 and the second through hole 23 together form a complete cable 3 through-hole, enabling the cable 3 to smoothly enter the first tube 1 from the second tube 2 and achieve continuous cable 3 through-hole.

[0032] Specifically, a fixing ring 12 is fixedly connected inside the first through hole 11, a fixing plate 13 is fixedly connected to one side of the fixing ring 12, a third through hole 14 is opened on the fixing plate 13, a cable 3 is inserted into the third through hole 14, a spring 15 is fixedly connected to one side of the fixing plate 13, and a cone-shaped spike block 21 is fixedly connected to one end of the spring 15.

[0033] The fixing ring 12 is used to fix the plate 13, and the fixing plate 13 is used to fix the spring 15. The fixing ring 12 is connected to the first cylinder 1 to ensure that the elastic force of the spring 15 can act on the cone-shaped spike block 21. The third through hole 14 further guides the cable 3. Its position is coaxial with the second through hole 23 and the first through hole 11. When the cable 3 passes through it, it can prevent the cable 3 from rubbing or getting stuck with the fixing plate 13 in the first cylinder 1. At the same time, it also provides radial constraint for the cable 3 and reduces shaking. One end of the spring 15 is fixed to the fixing plate 13, and the other end is connected to the cone-shaped spike block 21. Under normal conditions, it is in a naturally extended state. When the cable 3 is inserted in the forward direction, the cable 3 pushes the cone-shaped spike block 21 toward the fixing plate 1. When the cable 3 moves in three directions, the spring 15 is compressed and stores elastic potential energy. When the cable 3 moves backward, the spring 15 releases the elastic potential energy, pushing the spike block 21 towards the frustum section of the second cylinder 2, thus achieving automatic reset of the spike block 21 without manual operation. At the same time, when the elastic potential energy of the spring 15 is greater than the frictional force between the cable 3 and the spike block 21 (this frictional force is not the frictional force that hinders the backward movement of the cable 3, but the frictional force between the spike 22 and the cable 3 in the same direction), the spring 15 pushes the spike block 21 towards the frustum section of the second cylinder 2 for fixation. Then the cable 3 pushes the spike block 21 again, compressing the spring 15. This process is repeated until the cable 3 no longer moves forward, and the spring 15 pushes the spike block 21 for fixation.

[0034] In summary, during forward threading, the front end of the cable 3 contacts the cone-shaped spike block 21 and applies a pushing force, pushing the cone-shaped spike block 21 to move along the second through hole 23 towards the first cylinder 1. At this time, the spring 15 is compressed, the telescopic rod 24 is extended, and the cable 3 can pass through the second cylinder 2 and the first through hole 11 without obstruction, completing the pulling and pushing. If cable 3 tends to move backward due to external force, the pushing force of cable 3 on the cone-shaped spike block 21 disappears, and spring 15 resets under the action of elastic potential energy, pushing the cone-shaped spike block 21 to move towards the cone section of the second cylinder 2. As the inner diameter of the cone section gradually decreases, the cone-shaped spike block 21 is squeezed towards the cable 3 during the movement. As cable 3 moves backward, the opposite side of the oblique spike 22 is clamped to cable 3. At the same time, the cone-shaped spike block 21 is tightly clamped to cable 3 under the constraint of the inner wall of the cone section. The mechanical clamping and friction force work together to prevent cable 3 from moving backward, thus achieving the reverse stop function.

[0035] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A reverse stop mechanism for a cable pulling device, characterized in that: include, The first cylinder (1) is fixedly connected to the second cylinder (2); Cable (3), the cable (3) passes through the interior of the second tube (2) and the first tube (1); The second cylinder (2) includes a plurality of spikes (21), which are disposed inside the second cylinder (2) and can prevent the cable (3) from moving backward.

2. The anti-reverse mechanism of the cable pulling device according to claim 1, characterized in that: The second cylinder (2) is composed of a cylindrical section and a frustum section. The cylindrical section of the second cylinder (2) is located close to the first cylinder (1), and the cylindrical section of the second cylinder (2) is located away from the first cylinder (1).

3. The anti-reverse mechanism of the cable pulling device according to claim 2, characterized in that: The second tube (2) has a second through hole (23) inside, and the cable (3) is inserted into the second through hole (23) and moves along its axial direction.

4. The anti-reverse mechanism of the cable pulling device according to claim 3, characterized in that: The cone-shaped piercing block (21) is slidably connected inside the second through hole (23). The inner wall of the second through hole (23) is adapted to the outer wall of the cone-shaped piercing block (21). The cone-shaped piercing block (21) is fixedly connected to the side facing the cable (3) with a slanted piercing (22). The slanted piercing (22) is aligned with the insertion direction of the cable (3).

5. The anti-reverse mechanism of the cable pulling device according to claim 4, characterized in that: Multiple cone-shaped blocks (21) are evenly distributed in a ring and surround each other to form a cylindrical structure that matches the outer diameter of the cable (3). The cable (3) is inserted into the center of the cylindrical structure.

6. The anti-reverse mechanism of the cable pulling device according to claim 5, characterized in that: The adjacent cone-shaped blocks (21) are fixedly connected by telescopic rods (24).

7. The anti-reverse mechanism of the cable pulling device according to claim 6, characterized in that: The first cylinder (1) has a first through hole (11) axially opened inside. The first through hole (11) is connected to the second through hole (23) of the second cylinder (2). The cable (3) is inserted into the first through hole (11).

8. The anti-reverse mechanism of the cable pulling device according to claim 7, characterized in that: A fixing ring (12) is fixedly connected inside the first through hole (11), and a fixing plate (13) is fixedly connected to one side of the fixing ring (12).

9. The anti-reverse mechanism of the cable pulling device according to claim 8, characterized in that: The fixing plate (13) has a third through hole (14), and the cable (3) is inserted into the third through hole (14).

10. The anti-reverse mechanism of the cable pulling device according to claim 9, characterized in that: A spring (15) is fixedly connected to one side of the fixing plate (13), and the cone-shaped spike block (21) is fixedly connected to one end of the spring (15).

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